/* roulang page: index */
:root {
      --bg-base: #0B0E14;
      --bg-surface: #131822;
      --bg-surface-elevated: #1a2232;
      --bg-overlay: rgba(11, 14, 20, 0.85);
      --border-subtle: #1E2638;
      --border-glow: rgba(0, 240, 255, 0.35);
      --text-main: #F3F4F6;
      --text-muted: #9CA3AF;
      --text-dim: #6B7280;
      --cyan-neon: #00F0FF;
      --cyan-deep: #0099aa;
      --green-neon: #10B981;
      --purple-neon: #7C3AED;
      --amber-neon: #F59E0B;
      --shadow-cyan: 0 0 25px rgba(0, 240, 255, 0.12);
      --radius-sm: 8px;
      --radius-md: 14px;
      --radius-lg: 20px;
      --font-mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", monospace;
    }

    * {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
    }

    html {
      scroll-behavior: smooth;
      background-color: var(--bg-base);
      color: var(--text-main);
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    }

    body {
      overflow-x: hidden;
      line-height: 1.6;
      background-color: var(--bg-base);
    }

    a {
      color: inherit;
      text-decoration: none;
      transition: color 0.2s ease;
    }

    img {
      max-width: 100%;
      height: auto;
      display: block;
    }

    .container {
      width: 100%;
      max-width: 1280px;
      margin-left: auto;
      margin-right: auto;
      padding-left: 20px;
      padding-right: 20px;
    }

    .font-mono {
      font-family: var(--font-mono);
    }

    /* Topbar */
    .topbar {
      background: #07090d;
      border-bottom: 1px solid var(--border-subtle);
      font-size: 13px;
      color: var(--text-muted);
      padding: 8px 0;
    }
    .topbar-wrap {
      display: flex;
      justify-content: space-between;
      align-items: center;
      flex-wrap: wrap;
      gap: 10px;
    }
    .status-light {
      display: inline-flex;
      align-items: center;
      gap: 8px;
    }
    .status-dot {
      width: 8px;
      height: 8px;
      background-color: var(--green-neon);
      border-radius: 50%;
      box-shadow: 0 0 8px var(--green-neon);
      animation: pulse 2s infinite;
    }
    @keyframes pulse {
      0% { opacity: 1; transform: scale(1); }
      50% { opacity: 0.4; transform: scale(0.9); }
      100% { opacity: 1; transform: scale(1); }
    }

    /* Header Nav */
    .site-header {
      position: sticky;
      top: 0;
      z-index: 100;
      background: rgba(11, 14, 20, 0.92);
      backdrop-filter: blur(12px);
      -webkit-backdrop-filter: blur(12px);
      border-bottom: 1px solid var(--border-subtle);
      transition: all 0.3s ease;
    }
    .nav-wrap {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 72px;
    }
    .logo {
      display: flex;
      align-items: center;
      gap: 12px;
      font-size: 20px;
      font-weight: 800;
      letter-spacing: -0.5px;
      color: #fff;
    }
    .logo-badge {
      background: linear-gradient(135deg, var(--cyan-neon), var(--purple-neon));
      color: #000;
      font-size: 12px;
      font-weight: 900;
      padding: 3px 8px;
      border-radius: 6px;
      text-transform: uppercase;
    }
    .nav-links {
      display: flex;
      align-items: center;
      gap: 28px;
      list-style: none;
    }
    .nav-link {
      font-size: 15px;
      color: var(--text-muted);
      font-weight: 500;
      position: relative;
      padding: 8px 0;
    }
    .nav-link:hover {
      color: var(--cyan-neon);
    }
    .nav-link::after {
      content: "";
      position: absolute;
      bottom: 0;
      left: 0;
      width: 0;
      height: 2px;
      background: var(--cyan-neon);
      transition: width 0.25s ease;
    }
    .nav-link:hover::after {
      width: 100%;
    }
    .nav-actions {
      display: flex;
      align-items: center;
      gap: 16px;
    }
    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 10px 22px;
      font-size: 14px;
      font-weight: 600;
      border-radius: var(--radius-sm);
      cursor: pointer;
      transition: all 0.25s ease;
      white-space: nowrap;
      border: 1px solid transparent;
    }
    .btn-primary {
      background: var(--cyan-neon);
      color: #0B0E14;
      box-shadow: 0 0 15px rgba(0, 240, 255, 0.3);
    }
    .btn-primary:hover {
      background: #73f6ff;
      transform: translateY(-2px);
      box-shadow: 0 0 25px rgba(0, 240, 255, 0.5);
    }
    .btn-outline {
      background: transparent;
      border-color: var(--border-subtle);
      color: var(--text-main);
    }
    .btn-outline:hover {
      border-color: var(--cyan-neon);
      color: var(--cyan-neon);
      background: rgba(0, 240, 255, 0.05);
    }
    .menu-toggle {
      display: none;
      background: none;
      border: 1px solid var(--border-subtle);
      color: #fff;
      padding: 8px 12px;
      border-radius: 6px;
      cursor: pointer;
    }

    /* Sections Shared */
    section {
      padding: 80px 0;
      position: relative;
    }
    .section-alt {
      background-color: #0e121a;
      border-top: 1px solid var(--border-subtle);
      border-bottom: 1px solid var(--border-subtle);
    }
    .section-head {
      margin-bottom: 48px;
    }
    .section-tag {
      display: inline-block;
      font-size: 13px;
      font-weight: 700;
      color: var(--cyan-neon);
      letter-spacing: 1px;
      text-transform: uppercase;
      margin-bottom: 12px;
      background: rgba(0, 240, 255, 0.1);
      padding: 4px 12px;
      border-radius: 4px;
      border: 1px solid rgba(0, 240, 255, 0.25);
    }
    .section-title {
      font-size: 32px;
      font-weight: 800;
      letter-spacing: -0.5px;
      line-height: 1.3;
      margin-bottom: 14px;
      color: #ffffff;
    }
    .section-desc {
      font-size: 16px;
      color: var(--text-muted);
      max-width: 820px;
      line-height: 1.7;
    }

    /* Hero Section (5:7 Diagonal Slanted) */
    #hero {
      position: relative;
      padding: 90px 0 100px;
      overflow: hidden;
      background: radial-gradient(circle at 80% 20%, rgba(124, 58, 237, 0.15), transparent 50%),
                  radial-gradient(circle at 20% 80%, rgba(0, 240, 255, 0.12), transparent 50%),
                  #0B0E14;
    }
    .hero-grid {
      display: grid;
      grid-template-columns: 5fr 7fr;
      align-items: center;
      gap: 40px;
    }
    .hero-content {
      position: relative;
      z-index: 2;
    }
    .hero-kicker {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      background: rgba(16, 185, 129, 0.12);
      border: 1px solid rgba(16, 185, 129, 0.3);
      color: var(--green-neon);
      padding: 6px 14px;
      border-radius: 20px;
      font-size: 13px;
      font-weight: 600;
      margin-bottom: 24px;
    }
    .hero-title {
      font-size: 42px;
      font-weight: 900;
      line-height: 1.22;
      color: #fff;
      margin-bottom: 20px;
      letter-spacing: -1px;
    }
    .hero-title span {
      background: linear-gradient(135deg, #00F0FF 0%, #3B82F6 50%, #A855F7 100%);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }
    .hero-lead {
      font-size: 16px;
      color: var(--text-muted);
      line-height: 1.75;
      margin-bottom: 32px;
    }
    .hero-actions {
      display: flex;
      flex-wrap: wrap;
      gap: 16px;
      margin-bottom: 40px;
    }
    .hero-stats-row {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 20px;
      padding-top: 24px;
      border-top: 1px solid var(--border-subtle);
    }
    .hero-stat-item h4 {
      font-size: 26px;
      font-weight: 800;
      color: var(--cyan-neon);
      margin-bottom: 4px;
    }
    .hero-stat-item p {
      font-size: 13px;
      color: var(--text-dim);
    }
    .hero-stage {
      position: relative;
      z-index: 2;
      perspective: 1000px;
    }
    .hero-card-slanted {
      position: relative;
      background: var(--bg-surface);
      border: 1px solid var(--border-subtle);
      border-radius: var(--radius-lg);
      padding: 12px;
      box-shadow: -20px 25px 60px rgba(0, 0, 0, 0.6), 0 0 35px rgba(0, 240, 255, 0.15);
      transform: rotateY(-6deg) rotateX(4deg);
      transition: transform 0.4s ease;
    }
    .hero-card-slanted:hover {
      transform: rotateY(0deg) rotateX(0deg);
    }
    .hero-card-slanted img {
      border-radius: var(--radius-md);
      object-fit: cover;
      width: 100%;
      height: 440px;
    }
    .floating-telemetry {
      position: absolute;
      bottom: -20px;
      left: -20px;
      background: rgba(19, 24, 34, 0.95);
      backdrop-filter: blur(10px);
      border: 1px solid var(--cyan-neon);
      border-radius: var(--radius-md);
      padding: 16px 20px;
      box-shadow: 0 10px 30px rgba(0,0,0,0.5);
    }
    .floating-telemetry .label {
      font-size: 11px;
      color: var(--text-muted);
      text-transform: uppercase;
      letter-spacing: 0.5px;
    }
    .floating-telemetry .value {
      font-size: 18px;
      font-weight: 800;
      color: var(--green-neon);
    }

    /* Section 2: Metrics Dashboard Mockup */
    .metrics-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
    }
    .metric-card {
      background: var(--bg-surface);
      border: 1px solid var(--border-subtle);
      border-radius: var(--radius-md);
      padding: 24px;
      position: relative;
      overflow: hidden;
      transition: transform 0.3s ease, border-color 0.3s ease;
    }
    .metric-card:hover {
      transform: translateY(-4px);
      border-color: rgba(0, 240, 255, 0.5);
    }
    .metric-card::before {
      content: "";
      position: absolute;
      top: 0;
      left: 0;
      width: 100%;
      height: 3px;
      background: linear-gradient(90deg, transparent, var(--cyan-neon), transparent);
      opacity: 0;
      transition: opacity 0.3s ease;
    }
    .metric-card:hover::before {
      opacity: 1;
    }
    .metric-header {
      display: flex;
      justify-content: space-between;
      align-items: center;
      margin-bottom: 12px;
    }
    .metric-name {
      font-size: 14px;
      color: var(--text-muted);
      font-weight: 500;
    }
    .metric-delta {
      font-size: 12px;
      padding: 2px 8px;
      border-radius: 4px;
      font-weight: 700;
    }
    .delta-up {
      background: rgba(16, 185, 129, 0.15);
      color: var(--green-neon);
    }
    .delta-down {
      background: rgba(245, 158, 11, 0.15);
      color: var(--amber-neon);
    }
    .metric-num {
      font-size: 32px;
      font-weight: 800;
      color: #ffffff;
      margin-bottom: 8px;
    }
    .metric-caption {
      font-size: 13px;
      color: var(--text-dim);
    }

    /* Section 3: Architecture */
    .arch-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 40px;
      align-items: center;
    }
    .arch-preview {
      position: relative;
      border-radius: var(--radius-lg);
      border: 1px solid var(--border-subtle);
      overflow: hidden;
    }
    .arch-preview img {
      width: 100%;
      height: 480px;
      object-fit: cover;
    }
    .arch-stack {
      display: flex;
      flex-direction: column;
      gap: 18px;
    }
    .arch-item {
      background: var(--bg-surface);
      border: 1px solid var(--border-subtle);
      border-radius: var(--radius-md);
      padding: 20px;
      transition: border-color 0.25s ease;
    }
    .arch-item:hover {
      border-color: rgba(0, 240, 255, 0.4);
    }
    .arch-item-title {
      font-size: 17px;
      font-weight: 700;
      color: var(--cyan-neon);
      margin-bottom: 6px;
      display: flex;
      justify-content: space-between;
    }
    .arch-item-text {
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.6;
    }

    /* Section 4: Advantages (6 Grid) */
    .adv-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .adv-card {
      background: var(--bg-surface);
      border: 1px solid var(--border-subtle);
      border-radius: var(--radius-md);
      padding: 30px;
      transition: transform 0.3s ease, border-color 0.3s ease;
      position: relative;
    }
    .adv-card:hover {
      transform: translateY(-5px);
      border-color: rgba(0, 240, 255, 0.45);
      box-shadow: var(--shadow-cyan);
    }
    .adv-icon {
      width: 48px;
      height: 48px;
      border-radius: 10px;
      background: rgba(0, 240, 255, 0.1);
      display: flex;
      align-items: center;
      justify-content: center;
      margin-bottom: 20px;
      border: 1px solid rgba(0, 240, 255, 0.3);
      font-weight: 800;
      color: var(--cyan-neon);
    }
    .adv-title {
      font-size: 18px;
      font-weight: 700;
      margin-bottom: 12px;
      color: #ffffff;
    }
    .adv-desc {
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.65;
    }

    /* Section 5: Services Matrix */
    .service-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .service-card {
      background: var(--bg-surface);
      border: 1px solid var(--border-subtle);
      border-radius: var(--radius-lg);
      padding: 32px;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
      position: relative;
    }
    .service-card.highlight {
      border-color: var(--cyan-neon);
      box-shadow: 0 0 30px rgba(0, 240, 255, 0.18);
    }
    .service-tier {
      font-size: 13px;
      text-transform: uppercase;
      font-weight: 800;
      color: var(--cyan-neon);
      letter-spacing: 1px;
      margin-bottom: 8px;
    }
    .service-title {
      font-size: 22px;
      font-weight: 800;
      margin-bottom: 14px;
    }
    .service-desc {
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.6;
      margin-bottom: 24px;
    }
    .service-features {
      list-style: none;
      margin-bottom: 30px;
      display: flex;
      flex-direction: column;
      gap: 12px;
    }
    .service-features li {
      font-size: 14px;
      color: var(--text-muted);
      display: flex;
      align-items: center;
      gap: 10px;
    }
    .service-features li::before {
      content: "✔";
      color: var(--green-neon);
      font-weight: bold;
    }

    /* Section 6: Results Comparison */
    .compare-container {
      background: var(--bg-surface);
      border: 1px solid var(--border-subtle);
      border-radius: var(--radius-lg);
      overflow: hidden;
    }
    .compare-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
    }
    .compare-col {
      padding: 40px;
    }
    .compare-col.traditional {
      background: rgba(19, 24, 34, 0.6);
      border-right: 1px solid var(--border-subtle);
    }
    .compare-col.software {
      background: rgba(0, 240, 255, 0.03);
    }
    .compare-col h3 {
      font-size: 22px;
      margin-bottom: 24px;
      display: flex;
      align-items: center;
      gap: 12px;
    }
    .compare-list {
      display: flex;
      flex-direction: column;
      gap: 20px;
      list-style: none;
    }
    .compare-list li {
      display: flex;
      flex-direction: column;
      gap: 4px;
    }
    .compare-list .head {
      font-size: 15px;
      font-weight: 700;
    }
    .compare-list .detail {
      font-size: 13px;
      color: var(--text-muted);
    }
    .traditional .head { color: #f87171; }
    .software .head { color: var(--green-neon); }

    /* Section 7: Engine Deep Black */
    #engine {
      background: #05070a;
      border-top: 1px solid var(--border-subtle);
      border-bottom: 1px solid var(--border-subtle);
      padding: 90px 0;
    }
    .engine-wrapper {
      display: grid;
      grid-template-columns: 7fr 5fr;
      gap: 48px;
      align-items: center;
    }
    .engine-badge {
      display: inline-block;
      padding: 4px 10px;
      border-radius: 4px;
      font-size: 12px;
      background: rgba(124, 58, 237, 0.2);
      color: #c084fc;
      border: 1px solid rgba(124, 58, 237, 0.4);
      margin-bottom: 16px;
    }
    .engine-code {
      background: #000;
      border: 1px solid #1E2638;
      border-radius: var(--radius-md);
      padding: 24px;
      color: #38bdf8;
      font-size: 13px;
      line-height: 1.8;
      overflow-x: auto;
    }

    /* Section 8: Case Studies */
    .case-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .case-card {
      background: var(--bg-surface);
      border: 1px solid var(--border-subtle);
      border-radius: var(--radius-md);
      overflow: hidden;
      transition: transform 0.3s ease;
    }
    .case-card:hover {
      transform: translateY(-5px);
    }
    .case-card img {
      width: 100%;
      height: 200px;
      object-fit: cover;
    }
    .case-body {
      padding: 24px;
    }
    .case-tag {
      font-size: 12px;
      color: var(--amber-neon);
      font-weight: 700;
      margin-bottom: 8px;
    }
    .case-title {
      font-size: 18px;
      font-weight: 700;
      margin-bottom: 10px;
      line-height: 1.4;
    }
    .case-desc {
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.6;
    }

    /* Section 9: Milestones */
    .milestone-timeline {
      position: relative;
      margin-top: 40px;
      padding-left: 30px;
    }
    .milestone-timeline::before {
      content: "";
      position: absolute;
      left: 7px;
      top: 0;
      bottom: 0;
      width: 2px;
      background: var(--border-subtle);
    }
    .milestone-node {
      position: relative;
      margin-bottom: 36px;
    }
    .milestone-node::before {
      content: "";
      position: absolute;
      left: -29px;
      top: 6px;
      width: 14px;
      height: 14px;
      border-radius: 50%;
      background: var(--bg-base);
      border: 3px solid var(--cyan-neon);
    }
    .milestone-date {
      font-size: 13px;
      color: var(--cyan-neon);
      font-weight: 700;
      margin-bottom: 4px;
    }
    .milestone-title {
      font-size: 18px;
      font-weight: 700;
      color: #fff;
      margin-bottom: 8px;
    }
    .milestone-desc {
      font-size: 14px;
      color: var(--text-muted);
      max-width: 760px;
    }

    /* Section 10: Stats Counters */
    .stats-banner {
      background: linear-gradient(180deg, #101520 0%, #0B0E14 100%);
      border-top: 1px solid var(--border-subtle);
      border-bottom: 1px solid var(--border-subtle);
      padding: 60px 0;
    }
    .stats-row {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 30px;
      text-align: center;
    }
    .stat-box h3 {
      font-size: 44px;
      font-weight: 900;
      color: var(--cyan-neon);
      margin-bottom: 8px;
    }
    .stat-box p {
      font-size: 14px;
      color: var(--text-muted);
    }

    /* Section 11: Testimonials */
    .review-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .review-card {
      background: var(--bg-surface);
      border: 1px solid var(--border-subtle);
      border-radius: var(--radius-md);
      padding: 28px;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }
    .review-text {
      font-size: 15px;
      color: var(--text-muted);
      line-height: 1.7;
      margin-bottom: 24px;
      font-style: italic;
    }
    .review-user {
      display: flex;
      align-items: center;
      gap: 14px;
    }
    .review-avatar {
      width: 44px;
      height: 44px;
      border-radius: 50%;
      border: 1px solid var(--cyan-neon);
      background: #1a2232;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: bold;
      color: var(--cyan-neon);
    }
    .review-info h4 {
      font-size: 15px;
      font-weight: 700;
      color: #fff;
    }
    .review-info p {
      font-size: 12px;
      color: var(--text-dim);
    }

    /* Section 12: Security */
    .sec-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
    }
    .sec-card {
      background: var(--bg-surface);
      border: 1px solid var(--border-subtle);
      border-radius: var(--radius-md);
      padding: 24px;
      text-align: center;
    }
    .sec-icon {
      font-size: 28px;
      margin-bottom: 12px;
      display: inline-block;
    }
    .sec-title {
      font-size: 16px;
      font-weight: 700;
      margin-bottom: 8px;
    }
    .sec-desc {
      font-size: 13px;
      color: var(--text-muted);
    }

    /* Section 13: Insights / News */
    .news-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .news-card {
      background: var(--bg-surface);
      border: 1px solid var(--border-subtle);
      border-radius: var(--radius-md);
      overflow: hidden;
      display: flex;
      flex-direction: column;
    }
    .news-card img {
      width: 100%;
      height: 180px;
      object-fit: cover;
    }
    .news-content {
      padding: 24px;
      flex-grow: 1;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }
    .news-date {
      font-size: 12px;
      color: var(--cyan-neon);
      margin-bottom: 6px;
    }
    .news-title {
      font-size: 17px;
      font-weight: 700;
      margin-bottom: 10px;
      line-height: 1.4;
    }
    .news-excerpt {
      font-size: 13px;
      color: var(--text-muted);
      line-height: 1.6;
      margin-bottom: 18px;
    }

    /* Section 14: FAQ Accordion */
    .faq-list {
      max-width: 860px;
      margin: 0 auto;
      display: flex;
      flex-direction: column;
      gap: 14px;
    }
    details.faq-item {
      background: var(--bg-surface);
      border: 1px solid var(--border-subtle);
      border-radius: var(--radius-md);
      padding: 18px 24px;
      transition: all 0.2s ease;
    }
    details.faq-item[open] {
      border-color: rgba(0, 240, 255, 0.4);
    }
    summary.faq-question {
      font-size: 16px;
      font-weight: 700;
      color: #fff;
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
      list-style: none;
    }
    summary.faq-question::-webkit-details-marker {
      display: none;
    }
    summary.faq-question::after {
      content: "+";
      font-size: 20px;
      color: var(--cyan-neon);
      transition: transform 0.25s ease;
    }
    details.faq-item[open] summary.faq-question::after {
      transform: rotate(45deg);
    }
    .faq-answer {
      margin-top: 14px;
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.7;
      padding-top: 12px;
      border-top: 1px solid rgba(255, 255, 255, 0.06);
    }

    /* Section 15: Contact / Conversion */
    .contact-box {
      background: linear-gradient(135deg, rgba(19, 24, 34, 0.95), rgba(11, 14, 20, 0.98));
      border: 1px solid var(--border-subtle);
      border-radius: var(--radius-lg);
      padding: 48px;
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 48px;
    }
    .contact-info h3 {
      font-size: 30px;
      font-weight: 800;
      margin-bottom: 16px;
    }
    .contact-info p {
      font-size: 15px;
      color: var(--text-muted);
      line-height: 1.7;
      margin-bottom: 28px;
    }
    .contact-perks {
      display: flex;
      flex-direction: column;
      gap: 12px;
    }
    .contact-perk {
      display: flex;
      align-items: center;
      gap: 10px;
      font-size: 14px;
      color: var(--text-main);
    }
    .contact-form {
      display: flex;
      flex-direction: column;
      gap: 16px;
    }
    .form-group {
      display: flex;
      flex-direction: column;
      gap: 6px;
    }
    .form-group label {
      font-size: 13px;
      color: var(--text-muted);
      font-weight: 500;
    }
    .form-input {
      background: #0B0E14;
      border: 1px solid var(--border-subtle);
      border-radius: var(--radius-sm);
      padding: 12px 14px;
      font-size: 14px;
      color: #fff;
      transition: border-color 0.2s ease;
    }
    .form-input:focus {
      outline: none;
      border-color: var(--cyan-neon);
      box-shadow: 0 0 10px rgba(0, 240, 255, 0.2);
    }
    .form-select {
      background: #0B0E14;
      border: 1px solid var(--border-subtle);
      border-radius: var(--radius-sm);
      padding: 12px 14px;
      font-size: 14px;
      color: #fff;
    }

    /* Footer */
    .site-footer {
      background: #07090d;
      border-top: 1px solid var(--border-subtle);
      padding: 60px 0 30px;
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1fr;
      gap: 40px;
      margin-bottom: 40px;
    }
    .footer-about p {
      font-size: 14px;
      color: var(--text-dim);
      line-height: 1.7;
      margin-top: 14px;
      max-width: 320px;
    }
    .footer-col h4 {
      font-size: 15px;
      font-weight: 700;
      color: #fff;
      margin-bottom: 16px;
    }
    .footer-links {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }
    .footer-links a {
      font-size: 13px;
      color: var(--text-muted);
    }
    .footer-links a:hover {
      color: var(--cyan-neon);
    }
    .footer-bottom {
      border-top: 1px solid var(--border-subtle);
      padding-top: 24px;
      display: flex;
      justify-content: space-between;
      align-items: center;
      flex-wrap: wrap;
      gap: 16px;
      font-size: 13px;
      color: var(--text-dim);
    }

    /* Responsive */
    @media (max-width: 1024px) {
      .hero-grid { grid-template-columns: 1fr; }
      .hero-stage { margin-top: 40px; }
      .metrics-grid { grid-template-columns: repeat(2, 1fr); }
      .adv-grid { grid-template-columns: repeat(2, 1fr); }
      .service-grid { grid-template-columns: 1fr; }
      .engine-wrapper { grid-template-columns: 1fr; }
      .case-grid { grid-template-columns: 1fr; }
      .stats-row { grid-template-columns: repeat(2, 1fr); }
      .review-grid { grid-template-columns: 1fr; }
      .sec-grid { grid-template-columns: repeat(2, 1fr); }
      .news-grid { grid-template-columns: 1fr; }
      .contact-box { grid-template-columns: 1fr; }
      .footer-grid { grid-template-columns: 1fr 1fr; }
    }

    @media (max-width: 768px) {
      .menu-toggle { display: block; }
      .nav-links {
        display: none;
        position: absolute;
        top: 72px;
        left: 0;
        width: 100%;
        background: var(--bg-surface);
        flex-direction: column;
        padding: 20px;
        border-bottom: 1px solid var(--border-subtle);
      }
      .nav-links.active { display: flex; }
      .topbar-wrap { justify-content: center; }
      .hero-title { font-size: 30px; }
      .compare-grid { grid-template-columns: 1fr; }
      .compare-col.traditional { border-right: none; border-bottom: 1px solid var(--border-subtle); }
      .metrics-grid { grid-template-columns: 1fr; }
      .adv-grid { grid-template-columns: 1fr; }
      .arch-grid { grid-template-columns: 1fr; }
      .stats-row { grid-template-columns: 1fr; }
      .sec-grid { grid-template-columns: 1fr; }
      .footer-grid { grid-template-columns: 1fr; }
      .contact-box { padding: 24px; }
    }